Tooth-facing-attaching device.



S. S. WHBTSTONE.

TOOTH FACING ATTAGHING DEVICE.

APPLICATION FILED JUNE 7, 1911.

Patented Jan. 9, 1912.

MM m COLUMBIA PLANDCIBAPH CO..WASHINGTON D c UNITED STATES PATENTOFFICE.

SYLVESTER s. WHETSTONE, or TOLEDO, onto, ASSIGNOR or ONE-HALF TOFREDERICK A. KOTTS, 0F TOLEDO, OHIO.

TOOTH-FACINGr-ATTAGI-IING DEVICE.

Application filed June 7,

To all whom it may concern:

Be it known that I, SYLVESTER S. WHET- STONE, a citizen of the UnitedStates, residing at Toledo, in the county of Lucas and State of Ohio,have invented certain new and useful Improvements in Tooth-Facing-Attaching Devices; and I do declare the following to be a full, clear,and exact description of the invention, such as will enable othersskilled in the art to which it appertains to make and use the same,reference being had to the accompanying drawings, and to the letters andfigures of reference marked thereon, which form a part of thisspecification.

My invention relates to and its object is to provide a convenient,simple and efficient means for quickly and accurately securing to ametal backing,such as a metal bridge, cap or crown,a tooth-front orfacing composed of porcelain or the like.

To this end my invention consists of the devices and arrangement ofparts hereinafter described, and shown and illustrated in theaccompanying drawings, in which,-

Figure l is a front elevation of a bridge having porcelain facingssecured thereto according to my method, one of the facings being brokenaway to disclose the fastening device; Fig. 2, a vertical section of thesame on line 2--2, Fig. 1; Fig. 3, a vertical sectional elevation of afacing applied to a metal crown by means of my device, and Fig. 4:, atransverse sectional plan of the same on line H, Fig. 3.

Like parts are indicated by corresponding numerals throughout thedrawings.

In the drawings, 1 is a bridge or like part of metal or other suit-ablematerial having therethrough a threaded aperture 2.

3 is a stud, the threaded shank of which corresponds to and fitsaccurately the threaded opening 2. The head of the stud is elongatedand-in transverse section-is preferably of dove-tail outline, althoughother cross-sectional contours-curved or angular-may be employed.

Specification of Letters Patent.

Patented Jan. 9, 1912.

1911 Serial No. 631,679.

4 is a front or facing, in simulation of the front of a tooth, andcomposed of porcelain or other suitable material. In the back of thisfacing is a slot 5 leading from the gingival end toward the incisal endand of such area and form in cross-section as to exactlyreceive-endwise-the head of the stud 3. The elongated cavity or slotmay, if desired, be lined with suitable metal, as at 6.

In Figs. 3 and 4, the metal part, for further example, consists of acrown 7 For a bridge or crown may be substituted,as will now beapparent,'any metal part designed as a backing and support for theporcelain facing.

The metal backing having been suitably bored and threaded at the properpoint, the threaded shank of the stud 3 is screwed tightly into thethreaded hole in the backing with the elongated head of the studvertically disposed in the direction of its length. The porcelain frontbeing formed to fit themetal back and being slotted as described, thesurfaces of the parts which are designed to meet are coated with asuitable cement, and the end of the slot :5 is slipped over and upon thehead of the stud until the facing is seated in the proper position. Thework is now completed.

Having described my invention, what I claim and desire to secure byLetters Patent is,

In a device of the described character, a metal backing having athreaded aperture, a threaded stud engaged with said threaded apertureand having a forwardly projecting head, and a facing of suitablematerial having in its rear surface a slot corresponding incross-section with and adapted to engage the head of the stud.

In testimony whereof I affix my signature in presence of two witnesses.

SYLVESTER S. WHETSTONE.

W'itnesses:

WM. 0. BEMIS, LEONE KIBURTZ.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents.

Washington, D. C.

